CN114929965A - 涂覆纤维质幅材的方法和经表面涂覆的纤维质幅材 - Google Patents

涂覆纤维质幅材的方法和经表面涂覆的纤维质幅材 Download PDF

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CN114929965A
CN114929965A CN202080089499.1A CN202080089499A CN114929965A CN 114929965 A CN114929965 A CN 114929965A CN 202080089499 A CN202080089499 A CN 202080089499A CN 114929965 A CN114929965 A CN 114929965A
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fibrous web
textured
textured surface
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CN114929965B (zh
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K.巴克福克
I.海斯卡宁
O.尼伦
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Stora Enso Oyj
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Abstract

提供涂覆纤维质幅材，特别是包含纳米纤维素纤维的纤维质幅材的方法。该方法包括以下步骤：将涂覆剂施加至有纹理的基材的有纹理的表面区域，将纤维配料或湿纤维质幅材施加至经涂覆的有纹理的基材的有纹理的表面区域上，任选地进行脱水以提供湿纤维质幅材，和将所述湿纤维质幅材干燥使得所述涂覆剂的至少一部分转移至所述纤维质幅材。该方法提供具有改进的阻隔性质的经涂覆的纤维质幅材。

Description

涂覆纤维质幅材的方法和经表面涂覆的纤维质幅材
技术领域
提供涂覆纤维质幅材，特别是包含纳米纤维素纤维的纤维质幅材的方法。该方法提供经涂覆的纤维质幅材。
背景技术
纤维质幅材的大多数涂覆和表面处理–例如刀涂、膜和施胶压制或各种用印刷和其他接触以及非接触沉积技术制得的涂层–都是对干纤维质幅材进行的。
传统上，纸和纸板的大多数涂覆方法目的在于增强光学和印刷性质，而不考虑阻隔性质。为了实现有效的气体/气味和/或脂阻隔性，均匀且足够厚的涂层是必要的以提供不含针孔的涂层或阻隔体。
对干纤维质幅材进行的技术的一个问题在于表面处理使表面重新湿润并且因此尺寸稳定性和涂层品质非常取决于基底基材-涂层相互作用。对于亲水性基材，例如基于纤维素的基材特别地构成问题，其中亲水性和孔隙性导致在施用期间的水或液体吸收以及涂料(其通常是基于水的或基于水性的涂料)的调平(levelling)。
还有，另一个问题在于涂层主要被制造用来调节外观或最终产品性能，而不是来改进例如幅材制造工艺(其中在线涂覆对幅材的技术性质有额外要求，以避免例如幅材破裂等)。另一个问题在于由于前述的挑战，向薄纤维质幅材(例如纤维素膜或防脂纸)投配少量的化学品在产生平整(even，均匀)涂层方面可为非常困难的。
发明内容
提供涂覆纤维质幅材的方法，所述方法包括以下步骤：
a.提供有纹理的基材，其具有至少一个有纹理的表面区域，
b.将涂覆剂施加至所述有纹理的基材的有纹理的表面区域，以提供所述有纹理的基材的经涂覆的有纹理的表面区域；
c.将纤维配料施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；和将所述纤维配料脱水以提供湿纤维质幅材，或，
d.将湿纤维质幅材施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；
e.将来自步骤c或步骤d的所述湿纤维质幅材干燥使得所述涂覆剂的至少一部分转移至所述纤维质幅材，和
f.将经涂覆的纤维质幅材从所述有纹理的表面区域移除，从而提供经涂覆的纤维质幅材。
技术的额外方面描述在以下权利要求和说明书文本中。
附图说明
图1显示了有纹理的基材(20)的有纹理的表面区域(21)上的湿纤维质幅材(10)–有纹理的基材(20)在该情况中为有纹理的带–其具有涂层(30)，涂层(30)被脱水和干燥以提供具有涂层(300)的经涂覆的纤维质幅材(100)。
具体实施方式
提供涂覆纤维质幅材的一般方法，所述方法包括以下步骤：
a.提供具有至少一个有纹理的表面区域的有纹理的基材，
b.将涂覆剂施加至所述有纹理的基材的有纹理的表面区域，以提供所述有纹理的基材的经涂覆的有纹理的表面区域；
c.将纤维配料施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；和将所述纤维配料脱水以提供湿纤维质幅材，或，
d.将湿纤维质幅材施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；
e.将来自步骤c或步骤d的所述湿纤维质幅材干燥使得所述涂覆剂的至少一部分转移至所述纤维质幅材，和
f.将经涂覆的纤维质幅材从所述有纹理的表面区域移除，从而提供经涂覆的纤维质幅材。
用目前技术可获得的优点包括：
-在线涂覆，单层或多层涂层；如果依次使用多于一个有纹理的基材，那么可施加若干涂覆剂。
-与有纹理的基材的有纹理的表面区域的受控的粘附(控制尺寸稳定性，收缩率)
-薄涂层(例如0.1至100gsm，优选0.3至50gsm，更优选0.5至20gsm干重量)
-延长的压区(nip)；即当使用此方法时，涂层和纤维质幅材之间的接触时间是长的。接触时间优选比常规涂覆中通常使用的要长。
-改进的阻隔性质；即气体阻隔性、水蒸气阻隔性、气味阻隔性或油和脂阻隔性中的至少一种
-纤维质幅材的一侧的定制的均质或异质(不平整)涂层
提供有纹理的基材，其适宜地为有纹理的带或有纹理的圆柱体。通过利用有纹理的基材，可更准确地控制涂料的量，而不存在与压区等中过量涂料液体相关的问题。使用有纹理的基材提供进一步的优点，例如更好的形貌(profile，轮廓)控制(机器方向)和在用于接受的幅材上制造有纹理的图案的可能性。有纹理的基材具有至少一个有纹理的表面区域。
在本技术中，术语“有纹理的基材”–意指所述基材的表面区域具有预定的纹理(即其为有纹理的表面)。有纹理的表面区域的纹理是非随机的，并且因此与可被磨过的或被以其他方式处理以获得基本上随机的纹理的表面/表面区域/基材区分。适宜地，有纹理的表面区域具有预定的重复纹理，其中图案有规律地重复。有纹理的表面区域可包含基材的整个表面；例如在机器横向上的基材的整个宽度，和/或在机器方向上的整个长度。替代地，有纹理的表面区域仅包含基材的表面的一部分，并且可存在其他的无纹理的表面区域，例如在机器横向上的基材的边缘处，和/或间歇地在机器方向上。
纤维配料或湿纤维质幅材可因此还被施加在有纹理的表面区域外，即使得例如形成这样的经涂覆的纤维质幅材：其边缘区没有被涂覆。换言之，纤维配料或湿纤维质幅材的施加区可比有纹理的表面区域更宽/更大。
在一个实施方式中，“有纹理的表面区域”包含凹陷区域的重复图案和至少一个布置在所述凹陷区域之间的非凹陷区域，其中各凹陷区域距离相邻的非凹陷区域(一个或多个)凹陷有深度d，所述深度d在垂直于所述有纹理的基材的表面的方向测定，所述深度d可为1-100μm。
有纹理的基材可由金属或塑料制造，或适宜材料的组合制造，即有纹理的基材可为有纹理的带例如金属带、聚合物带或陶瓷带、或复合物带。有纹理的基材例如有纹理的带的长度可为1-300m并且宽度可为0.2-10m。有纹理的基材的有纹理的表面区域还可涂覆有例如陶瓷或塑料涂层例如以调节表面能。典型地，有纹理的基材的有纹理的表面区域包含多个凹部使得有纹理的表面区域的格槽(cell，单元)体积为0.5-1000cm3/m2，优选1-500cm3/m2且更优选1-100cm3/m2。
凹部的图案可通过蚀刻非导通或导通通道或格槽而提供在有纹理的表面区域中。还可沉积材料以产生凸起区。一个实例是使用激光技术用于雕刻有纹理的带或有纹理的圆柱体。
通过以所述方式使用有纹理的表面区域，在纤维质幅材上提供薄的平整涂层成为可能。
将涂覆剂施加至有纹理的基材的有纹理的表面区域。涂覆剂典型地包含一种或多种选自以下的涂覆组分：蜡、油、极性脂、金属皂、松香或其混合物。在一个优选的方面，涂覆组分为烷基烯酮二聚体(AKD)或脂肪酸树脂。
蜡的实例包括微晶蜡例如链烷烃蜡或聚乙烯、聚丙烯(PP)、其他天然或合成蜡和其乳液。蜡可为基于化石的、基于天然的或基于生物的例如蜂蜡、加拿巴蜡(carnauba wax，巴西棕榈蜡)、或生物蜡(TopScreenTM，来自Solenis)。
油的实例为植物油。极性脂的实例为脂肪酸或甘油三酯，例如硬脂酸、月桂酸、油酸等。
松香的实例为例如，乳液，乳液施胶剂(即松香酸，其用乳化剂或稳定剂例如酪蛋白或其他阳离子聚电解质溶解、分散、稀释等等以形成液体)，或松香皂施胶剂。
涂覆组分可为非反应性或反应性的。反应性涂覆组分可包括一种或多种烷基烯酮二聚体(AKD)或烯基琥珀酸酐(ASA)。
涂覆剂可为油包水(W/O)乳液或水包油(O/W)乳液，但O/W乳液是优选的。涂覆剂典型地为O/W乳液形式，所述O/W乳液包含以上列出的涂覆组分中的一种或多种。特别优选的O/W乳液包括苯乙烯丙烯酸酯、苯乙烯丁二烯、或聚醋酸乙烯酯、或其混合物的O/W乳液。水性乳液通常含有乳化试剂、稳定剂和其他添加剂例如杀生物剂或防腐剂。乳液的优选平均粒度为10-5000nm，优选50-500nm。
在特别的实施方式中，涂覆剂为微乳液或纳米乳液，其包含例如脂肪三酯和/或水解的AKD。涂覆剂适宜地包含一种或多种粘附剂例如阳离子聚合物。
以此方式使用涂覆剂使得能够控制与有纹理的表面区域的粘附(控制尺寸稳定性，收缩率)，同时仅施加薄涂层。
涂覆剂适宜地以如下的量施加至有纹理的表面区域：0.1-100gsm、优选0.3-50gsm且更优选0.5-20gsm。涂覆剂可施加在有纹理的表面区域上并且随后加热至40℃和400℃之间、优选60-240℃且最优选80-180℃的温度，取决于使用的涂覆剂和级别。涂覆组分的熔点优选在以下范围内：-40℃至+160℃，适宜地+30℃至+160℃。
在一个方面，一旦施加和干燥，纤维质幅材包含0.01-100gsm或更优选0.1-50gsm的涂覆剂。
在一个实施方式中，涂覆剂在纤维配料前施加至有纹理的表面区域。优选地，施加涂覆剂的涂覆方法为喷洒施加、幕施加、辊施加器、印刷、浸渍等。优选地，涂覆包括至少一个施加步骤和一个调平步骤。调平步骤意指去除过量的涂料液体，例如经由刮刀或棒。
优选地，在施加涂覆剂之前，有纹理的表面区域可用例如喷洒系统或蒸气清洁以确保其是干净的。
纤维配料可在流延步骤中施加至所述有纹理的基材的经涂覆的有纹理的表面区域上。随后将纤维配料脱水以提供湿纤维质幅材。纤维配料可在有纹理的基材的经涂覆的有纹理的表面区域上流延成形。在此情况中，流延成形意味着将纤维配料沉积至有纹理的表面区域上(间接或直接地)，其通过优选使用非接触沉积方法进行。流延成形可包括各种方法将湿配料施加至表面区域，例如幕或槽模类型的进料、喷洒、辊或棒等。
脱水是这样的工艺，其优选经由机械脱水(例如机械压制或过滤)和通过蒸发这两者进行。机械脱水当然是优选的，因为其比蒸发以更具成本效率的方式去除水。还有，机械脱水确保了与有纹理的表面区域的接触是良好的并且表面区域的纹理可复制至膜或幅材。机械脱水的另一个益处在于施加的压力(负压或正压)使幅材致密化，其促进了最终阻隔性质。脱水可在升高的温度下进行，虽然大部分水以机械方式被去除。还可单独或同时使用基于真空或毛细管的脱水作为机械脱水。脱水步骤还可通过施加声学或超声方法促进。机械脱水也具有其局限性并且因此剩余的水优选通过蒸发去除。在此情况中，基材通过辐射或对流或通过施加热空气或蒸汽而被加热。
当施加至有纹理的表面区域时，纤维配料的优选的干含量优选为0.1-50wt％或更优选0.5-30wt％且最优选1-25wt％。在一个实施方式中，当施加至有纹理的表面区域时，纤维配料的干含量为0.1-30wt％或1-20wt％或1-15wt％或1-10wt％。
将纤维配料施加至有纹理的表面区域的替代方案是将湿纤维质幅材施加至所述有纹理的基材的经涂覆的有纹理的表面区域上。在此替代方案中，当施加至有纹理的表面区域时，湿纤维质幅材已经形成。此替代方案允许在幅材成形程序中更大的自由度。
当施加至有纹理的表面区域时，湿纤维质幅材的干含量优选为5-90wt％或更优选8-80wt％且最优选10-60wt％。湿幅材或含水幅材优选具有给定的湿强度因此其可从成形单元转移至压制和干燥段。
在一个实施方式中，纤维配料是纤维素纤维(典型地纳米纤维素纤维)的水性悬浮体。在一个实施方式中，因此，纤维质幅材包含纤维素纤维，优选纳米纤维素纤维。
本发明提供幅材，其可包含纤维素纤维，优选纳米纤维素(即纳米纤维素幅材)。纳米纤维素在本技术的上下文中应意指具有至少一个维度优选直径，小于1000nm的纳米尺度纤维素纤维或纤丝。纳米纤维素悬浮体还可包含部分或非原纤化的纤维素或木质纤维素纤维。纤维素纤维优选原纤化至这样的程度，形成的纳米纤维素的最终比表面积为约1至约300m2/g，例如10至200m2/g或更优选50-200m2/g(当用BET方法测量经溶剂交换且冷冻干燥的材料时)。纳米纤维素的均值平均纤丝直径为1-1000nm，优选10-1000nm。纳米纤维素可通过分析高分辨率SEM或ESEM图像表征。
纤维质幅材可包含0.01-100wt％的量的纳米纤维素，基于幅材的总固含量计。适宜地，幅材中的纳米纤维素含量为至少50wt％，优选至少60wt％且更优选至少70wt％，基于幅材的总固含量计，在不存在任何涂层的情况下。在实施方式中，纳米纤维素幅材包含至多50wt％，例如至多30wt％，适宜地至多20wt％的部分原纤化或未原纤化的纤维素或木质纤维素纤维，其具有大于1000nm的均值平均纤丝直径，基于总固含量计。
存在多种制造纳米纤维素的方法，比如单或多道次精磨，预水解后接精磨或高剪切解离或纤丝释放。通常需要一种或数种预处理步骤以使得纳米纤维素制造实现能量效率且是可持续的这两者。待供应的浆的纤维素纤维可因此以酶或化学方式被预处理，例如以降低半纤维素或木质素的量。纤维素纤维可在原纤化之前被化学改性，其中纤维素分子含有不同于(或多于)原始纤维素中发现的官能团。这样的基团包括羧甲基、醛和/或羧基(通过N-氧基介导氧化获得的纤维素，例如"TEMPO")，或季铵(阳离子纤维素)。在上述方法之一中改性或氧化之后，更容易将纤维解离成纳米纤维素。
纳米纤维素可含有一些半纤维素；该量取决于植物源。预处理的纤维，例如水解的、预溶胀的、或氧化的纤维素原材料的机械解离用适宜的设备例如精磨机、研磨机、均质器、胶化器、摩擦研磨机、超声仪、单螺杆或双螺杆挤出机、流化器例如微流化器或宏流化器或流化器型均质器来进行。取决于纳米纤维素制造方法，产物还可含有细粒(fines)、或纳米结晶纤维素或例如木纤维或造纸工艺中存在其他化学品。该产物还可含有各种量的没有被有效原纤化的微米尺寸的纤维颗粒。
纳米纤维素可从木纤维素纤维，来自硬木或软木纤维两者，来生产。其还可从微生物源、农业纤维例如麦草浆、竹、甘蔗渣、或其他非木纤维源制造。其优选从浆制造，其包括来自原生纤维的浆，例如机械、化学和/或热机械浆。其还可从损纸或再循环的纸，即消费前和消费后的废料制造。
纳米纤维素可为天然的(即化学上未改性)，或其可被化学改性。磷酸化的纳米纤维素典型地通过使浸泡在NH4H2PO4、水和脲的溶液中的纤维素纤维反应并且随后使纤维原纤化而获得。一个特别的方法涉及提供纤维素浆纤维在水中的悬浮体，和用磷酸化试剂将在所述水悬浮体中的纤维素浆纤维磷酸化，随后用本领域常见的方法原纤化。适宜的磷酸化试剂包括磷酸、五氧化二磷、三氯氧磷、磷酸氢二铵和磷酸二氢钠。
幅材，和所得纤维配料，还可包括其他纤维素组分。
纳米纤维素幅材的一个优点在于它们对可见光可为透明的。优选地，因此，当对具有约30gsm的克重的幅材测量时，纳米纤维素幅材具有大于70％优选大于75％且更优选大于80％的透明度，根据标准DIN 53147测量。注意到，纳米纤维素幅材可具有对可见光的高透明度但对UV光的差透明度。然而，透明度可受涂层影响。
幅材/纤维配料还可包含一种或多种填料，例如纳米填料，范围为1-30重量％，基于幅材的总固含量计，在不含任何涂层的情况下。典型的纳米填料可为纳米粘土、膨润土、二氧化硅或硅酸盐、碳酸钙、滑石等。优选地，填料的至少一部分为片状填料。优选地，填料的一个维度应具有1nm至10μm的平均厚度或长度。如果测定填料的粒度分布，例如用光散射技术，优选的粒度应为大于90％为低于2μm。
幅材/纤维配料还可含有强化试剂例如纤维素衍生物或天然淀粉或改性淀粉，例如阳离子淀粉、非离子淀粉、阴离子淀粉或两性的淀粉。强化试剂还可以是合成聚合物。在进一步的实施方式中，纳米纤维素幅材/纤维配料还可含有留着和排水化学品例如阳离子聚丙烯酰胺、阴离子聚丙烯酰胺、二氧化硅、纳米粘土、明矾、PDADMAC、PEI、PVAm等。在仍进一步的实施方式中，幅材/纤维配料还可含有其他典型的加工或性能化学品例如染料或荧光增白剂、消泡剂、湿强度树脂、杀生物剂、疏水性试剂、阻隔化学品、增塑剂、保湿剂等。当用Brookfield粘度计在100rpm在40℃下测量时，悬浮体的粘度优选高于20cP、更优选高于40cP或最优选高于60cP。更高的粘度(在更高温度下)降低或防止湿幅材(配料)和表面上的涂覆层之间的互混。
纤维配料的pH不受限制，但优选为4-10且更优选5-9。纤维配料在有纹理的基材的经涂覆的表面区域上的流延适宜地在10-90℃且更优选20-70℃的温度下进行。
幅材/纤维配料可包含阳离子或阴离子纳米纤维素；例如羧甲基化纳米纤维素。在一个实施方式中，阳离子或阴离子纳米纤维素以小于纳米纤维素的总量的50wt％的量存在，优选以小于40wt％的量，或更优选以小于30wt％的量存在。
纤维质幅材在干燥时的克重为1-80gsm、优选10-50gsm、例如10-40gsm。对某些应用，克重可为低的，例如0.1-20gsm或更优选甚至0.1-10gsm。
湿纤维质幅材(来自前述替代方案中的任一种)随后被干燥使得所述涂覆剂的至少一部分转移至所述纤维质幅材。这大致地示于图1中。干燥步骤可在大于60℃、优选大于80℃且更优选大于90℃的温度并且在小于400℃的温度下进行。干燥步骤适宜地在高于涂覆组分中的至少一种的熔点的温度下进行，例如高于蜡、松香、烷基烯酮二聚体或脂肪酸树脂的熔点。优选的温度范围使得涂覆组分迁移至纤维质幅材。
取决于工艺参数，纤维质幅材可从有纹理的表面区域获得一些纹理。因此，在根据本发明的方法的一个方面中，经涂覆的纤维质幅材为经涂覆的有纹理的纤维质幅材。影响是否从有纹理的表面区域向纤维质幅材提供纹理(物理纹理效应(效果))的工艺参数或可例如为有纹理的表面区域和纤维质幅材之间的接触时间、干燥温度、机械脱水的使用、涂覆剂的量和涂覆剂的类型。例如，如果有纹理的表面区域的纹理的凹部被涂覆剂完全覆盖/填充，物理纹理效应可能更不明显。然而，如果有纹理的表面区域的纹理的凹部没有完全被涂覆剂或非常低粘度的化学品覆盖/填充(例如覆盖/填充50％)，其可获得化学和物理纹理效应这两者。
因此，取决于工艺参数，纤维质幅材可不从或基本上不从有纹理的表面区域获得任何纹理，但有纹理的表面区域的纹理仅用于或主要用于实现在纤维质幅材上提供改进的涂覆，例如薄的、平整的涂覆(涂层)。因此，在根据本发明的方法的另一个方面中，经涂覆的纤维质幅材为没有从有纹理的表面区域获得任何纹理的经涂覆的纤维质幅材(即没有通过物理纹理效应获得任何纹理)。然而，涂覆可提供均匀或有纹理的化学效应。
纤维配料或湿纤维质幅材与有纹理的表面区域适宜地在机器方向上的至少2m，优选至少5m的长度接触，以确保涂覆剂的合适接触和转移。该接触是在外部压力的协助下进行的，使得至少一个压机(press)或脱水织物可用于同时干燥幅材。
当使用此方法时，涂覆剂和纤维质幅材之间的接触时间是长的。适宜地，压区长度大于0.2m优选大于0.5m且最优选大于1.0m。这提供了所谓的“延长的压区”或涂覆剂和纤维质幅材之间的接触时间。在所有常规冲击涂覆中，涂覆冲击长度/时间非常短。
最后，将经涂覆的纤维质幅材从所述有纹理的表面区域移除，从而提供经涂覆的纤维质幅材。随后转移至幅材的涂覆剂的量取决于涂覆剂、干燥方法等。例如，转移至幅材的涂覆剂的量可为施加至有纹理的表面区域的涂覆剂的20-100％或20-99％或20-90％或20-80％或30-70％。因此，转移至幅材的涂覆剂的量可为例如施加至有纹理的表面区域的涂覆剂的100％，99％，90％，80％或70％。
典型地，纤维质幅材在有纹理的基材的横向上的宽度为大于500mm、优选大于1000mm且更优选大于1500mm。经涂覆的纤维质幅材适宜地为透明的或半透明的。
所得的经涂覆的纤维质幅材应具有至少一种选自以下的阻隔性质：UV阻隔性、油和脂阻隔性、氧阻隔性、气味阻隔性和水蒸气阻隔性、或其组合。纤维质幅材可为膜，即所得产物可为纤维素膜，例如纳米纤维素膜。
该技术可应用于纳米纤维素幅材制造，或如果使用延长的压区(带)的话，可应用于将优选含有纳米纤维素的幅材脱水或压延。其还可用于其他基于纤维素的幅材。
在根据本发明的方法的步骤c或步骤d之前，可将过量的涂覆剂从有纹理的表面区域去除，例如使用棒或刮刀。
尽管已经结合多个实施方式描述了本发明，但这些不应被认为是对本发明的限制。本领域技术人员可以通过根据需要组合各个方面和实施方式来提供落入权利要求内的其他实施方式。

Claims (20)

1.涂覆纤维质幅材的方法，所述方法包括以下步骤：
a.提供具有至少一个有纹理的表面区域的有纹理的基材，
b.将涂覆剂施加至所述有纹理的基材的有纹理的表面区域，以提供所述有纹理的基材的经涂覆的有纹理的表面区域；
c.将纤维配料施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；和将所述纤维配料脱水以提供湿纤维质幅材，或，
d.将湿纤维质幅材施加至所述有纹理的基材的经涂覆的有纹理的表面区域上；
e.将来自步骤c或步骤d的所述湿纤维质幅材干燥使得所述涂覆剂的至少一部分转移至所述纤维质幅材，和
f.将经涂覆的纤维质幅材从所述有纹理的表面区域移除，从而提供经涂覆的纤维质幅材。
2.根据权利要求1所述的方法，其中所述有纹理的表面区域具有预定的纹理，优选预定的重复纹理。
3.根据前述权利要求中任一项所述的方法，其中纤维质幅材包含纤维素纤维，优选纳米纤维素纤维。
4.根据前述权利要求中任一项所述的方法，其中所述有纹理的基材为有纹理的带，例如金属带，聚合物带或陶瓷带，或复合物带。
5.根据前述权利要求中任一项所述的方法，其中所述纤维配料或所述湿纤维质幅材与所述有纹理的基材的经涂覆的有纹理的表面区域在机器方向上的至少2m，优选至少5m的长度接触。
6.根据前述权利要求中任一项所述的方法，其中涂覆剂包含一种或多种选自以下的涂覆组分：蜡、油、极性脂、金属皂、松香或其混合物。
7.根据前述权利要求中任一项所述的方法，其中涂覆剂包含一种或多种涂覆组分，其为烷基烯酮二聚体(AKD)或脂肪酸树脂。
8.根据前述权利要求中任一项所述的方法，其中涂覆剂为油包水(W/O)乳液或水包油(O/W)乳液，优选O/W乳液。
9.根据前述权利要求中任一项所述的方法，其中涂覆剂包含一种或多种粘附剂，例如阳离子聚合物。
10.根据前述权利要求中任一项所述的方法，其中纤维质幅材包含量为0.01-100wt％的纳米纤维素，基于总固含量计，优选地，量为至少50wt％、优选至少60wt％且更优选至少70wt％，基于总固含量计。
11.根据前述权利要求中任一项所述的方法，其中有纹理的表面区域包含多个凹部使得有纹理的表面区域的格槽体积为0.5-1000cm3/m2、优选1-500cm3/m2且更优选1-100cm3/m2。
12.根据前述权利要求中任一项所述的方法，其中干燥步骤在高于涂覆剂的涂覆组分中的至少一种的熔点的温度下进行。
13.根据前述权利要求中任一项所述的方法，其中干燥步骤在大于60℃、优选大于80℃且更优选大于90℃的温度下且在小于400℃的温度下进行。
14.根据前述权利要求中任一项所述的方法，其中所述经涂覆的纤维质幅材为透明的或半透明的。
15.根据前述权利要求中任一项所述的方法，其中所述经涂覆的纤维质幅材为经涂覆的有纹理的纤维质幅材。
16.根据前述权利要求中任一项所述的方法，其中以如下的量将涂覆组合物施加至有纹理的表面区域：0.1-100gsm、优选0.3-50gsm且更优选0.5-20gsm，按干重量计。
17.根据前述权利要求中任一项所述的方法，其中所述经涂覆的纤维质幅材具有至少一种选自以下的阻隔性质：UV阻隔性、油和脂阻隔性、氧阻隔性、气味阻隔性和水蒸气阻隔性、或其组合。
18.根据前述权利要求中任一项所述的方法，其中纤维质幅材在有纹理的基材的横向上的宽度为大于500mm，优选大于1000mm且更优选大于1500mm。
19.根据前述权利要求中任一项所述的方法，其中在步骤c或步骤d之前，将过量的涂覆剂从有纹理的表面区域除去；例如使用棒或刮刀。
20.能够通过根据权利要求1-19中任一项所述的方法获得的经涂覆的纤维质幅材。
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